Battery to trunk-would this work?

Found this wiring diagram by a member here. What is the “Switched power source”that controls the alternators continuous duty relay?

View attachment 1716193988
https://www.forabodiesonly.com/mopar/threads/trunk-mount-battery-wire-routing.507732/post-1973731942
https://www.forabodiesonly.com/mopa...ery-disconnect-wiring.454312/#post-1972828436